In the late 1800's various principles (original horizontality, inclusions, cross cutting relations, etc.) were established and used to ________ . (read carefully)
A) organize the order in which events occurred on earth
B) prove that evolution was a valid theory that could explain many geologic observations
C) determine the age of the earth
D) determine the age of events on the earth
A) organize the order in which events occurred on earth
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Iron atoms, Fe, are better reducing agents than copper ions, Cu2+. In which direction do electrons flow when an iron nail is submerged in a solution of Cu2+ ions?
A) Electrons cannot flow from the nail to the Cu2+ ions because there is no conductor between the two. B) The electrons flow from the submerged nail to the copper ions in solution. C) The electrons flow from the positive charge on the nail to the negative charge on the nail. D) The electrons flow from the copper ions in solution to the submerged nail.
What does a comparison of meteorite abundances of metals with samples of Earth's mantle help geochemists understand?
A) the formation of crust through volcanic action B) the differentiation of Earth as it occurred after it formed C) the accretion of Earth from planetesimals D) the elements that have escaped Earth's gravity during its formation
If the magma cools and solidifies below the surface, it crystallizes as volcanic rocks.
Answer the following statement true (T) or false (F)
Pelagic clays contain lots of material that settles to the seafloor through the water column and are ________
A) less than 30% biogenous material B) more than 30% biogenous material C) more than 30% hydrogenous material D) less than 30% neritic material E) more than 30% neritic material